kc3-lang/gnulib/lib/openat-safer.c

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• Hash : 52c658e9
  Author :
  Date : 2009-09-02T17:14:26
  

  openat: declare in POSIX headers
  
  * NEWS: Mention this.
  * modules/openat (configure.ac): Declare witnesses.
  (Depends-on): Add fcntl-h, sys_stat, unistd.
  (Include): Mention correct headers.
  * modules/fcntl-h (Depends-on): Add link-warning.
  (Files): Add openat.m4.
  (Makefile.am): Substitute witnesses.
  * modules/sys_stat (Files, Makefile.am): Likewise.
  * modules/unistd (Files, Makefile.am): Likewise.
  * m4/openat.m4 (gl_FUNC_OPENAT, gl_FUNC_FCHOWNAT): Set witnesses.
  (gl_OPENAT_DEFAULTS): New macro.
  * m4/fcntl_h.m4 (gl_FCNTL_H_DEFAULTS): Use it.
  * m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Likewise.
  * m4/sys_stat_h.m4 (gl_SYS_STAT_H_DEFAULTS): Likewise.
  (SYS_STAT_H): Remove unused variable.
  * doc/posix-headers/fcntl.texi (fcntl.h): Update content.
  * lib/fcntl--.h (includes): Remove unneeded header.
  * lib/openat-safer.c (includes): Likewise.
  * lib/openat.h (AT_FDCWD, AT_SYMLINK_NOFOLLOW, AT_REMOVEDIR)
  (openat, fstatat, unlinkat, mkdirat, fchmodat, fchownat): Move to
  appropriate headers.
  (__OPENAT_PREFIX): Delete.
  * lib/fcntl.in.h (openat): Provide declaration.
  (AT_FDCWD): Fix Solaris bug.
  (AT_SYMLINK_NOFOLLOW, AT_REMOVEDIR): Provide macros.
  * lib/sys_stat.in.h (fstatat, mkdirat): Provide declaration.
  * lib/fchmodat.c (includes):  Adjust to find declaration.
  * lib/fchownat.c (includes): Likewise.
  * lib/mkdirat.c (includes): Likewise.
  * lib/fstatat.c (includes): Likewise.  Ensure original fstatat is
  still visible.
  
  Signed-off-by: Eric Blake <ebb9@byu.net>
  

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• lib/openat-safer.c

• /* Invoke openat, but avoid some glitches.
  
     Copyright (C) 2005, 2006, 2008-2009 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  /* Written by Paul Eggert for open, ported by Eric Blake for openat.  */
  
  #include <config.h>
  
  #include "fcntl-safer.h"
  
  #include <fcntl.h>
  #include <stdarg.h>
  #include "unistd-safer.h"
  
  int
  openat_safer (int fd, char const *file, int flags, ...)
  {
    mode_t mode = 0;
  
    if (flags & O_CREAT)
      {
        va_list ap;
        va_start (ap, flags);
  
        /* We have to use PROMOTED_MODE_T instead of mode_t, otherwise GCC 4
  	 creates crashing code when 'mode_t' is smaller than 'int'.  */
        mode = va_arg (ap, PROMOTED_MODE_T);
  
        va_end (ap);
      }
  
    return fd_safer (openat (fd, file, flags, mode));
  }
  

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